package cn.cyh.basic.interceptor;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.concurrent.TimeUnit;

@Component
public class LoginInterceptor implements HandlerInterceptor{
   @Autowired
   private RedisTemplate redisTemplate;


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("token");
        if (!StringUtils.isEmpty(token)){ // 有token
            Object loginTmp = redisTemplate.opsForValue().get(token);
            if (loginTmp != null){ // 刷新过期时间
                redisTemplate.opsForValue().set(token,loginTmp,30, TimeUnit.MINUTES);
                return true;// 放行
            }
        }
        response.setContentType("application/json;charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
        PrintWriter writer = response.getWriter();
        // {"success":false,"message":"noLogin" }
        writer.write("{\"success\":false,\"message\":\"noLogin\" }");
        writer.close();
        return false;
    }
}
